'JsonParser' is abstract; cannot be instantiated 0

Question

I'm trying to create a Kafka consumer in intellij but when I try to create the JsonParser it throws me an error :

JsonParser is abstract; cannot be instantiated 0

private static JsonParser jsonParser = new JsonParser();

private static String extractIdFromTweet(String tweetJson){
   
    return jsonParser.parse(tweetJson)
            .getAsJsonObject()
            .get("id_str")
            .getAsString();
}

I have tried:

1. gson maven dependency
2. org.json.simple.JSONObject
3. org.json.JSONObject

but the error still persist.

Answer 1

You need to create JsonParser using factory methods:

The following example demonstrates how to create a parser from a string that contains an empty JSON array:

JsonParser parser = Json.createParser(new StringReader("[]"));

The class JsonParserFactory also contains methods to create JsonParser instances. JsonParserFactory is preferred when creating multiple parser instances. A sample usage is shown in the following example:

JsonParserFactory factory = Json.createParserFactory();  
JsonParser parser1 = factory.createParser(...);